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177 lines
4.1 KiB
HTML
177 lines
4.1 KiB
HTML
<!doctype html>
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<html>
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<head>
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<title>Line Chart</title>
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<script src="../../../dist/chart.min.js"></script>
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<script src="../../utils.js"></script>
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<style>
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canvas{
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-moz-user-select: none;
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-webkit-user-select: none;
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-ms-user-select: none;
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}
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</style>
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</head>
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<body>
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<div style="width:75%;">
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<canvas id="canvas"></canvas>
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</div>
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<br>
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<br>
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<button id="randomizeData">Randomize Data</button>
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<button id="addDataset">Add Dataset</button>
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<button id="removeDataset">Remove Dataset</button>
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<button id="addData">Add Data</button>
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<button id="removeData">Remove Data</button>
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<script>
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var MONTHS = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
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var randomScalingFactor = function() {
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return Math.round(Math.random() * 100);
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};
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var config = {
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type: 'line',
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data: {
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labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
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datasets: [{
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label: 'My First dataset',
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backgroundColor: window.chartColors.red,
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borderColor: window.chartColors.red,
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data: [
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor()
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],
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fill: false,
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}, {
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label: 'My Second dataset',
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fill: false,
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backgroundColor: window.chartColors.blue,
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borderColor: window.chartColors.blue,
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data: [
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor()
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],
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}]
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},
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options: {
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responsive: true,
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plugins: {
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title: {
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display: true,
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text: 'Chart.js Line Chart'
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},
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tooltip: {
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mode: 'index',
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intersect: false,
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}
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},
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hover: {
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mode: 'nearest',
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intersect: true
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},
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scales: {
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x: {
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display: true,
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title: {
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display: true,
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text: 'Month'
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}
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},
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y: {
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display: true,
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title: {
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display: true,
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text: 'Value'
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},
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min: 0,
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max: 100,
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ticks: {
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// forces step size to be 5 units
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stepSize: 5
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}
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}
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}
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}
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};
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window.onload = function() {
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var ctx = document.getElementById('canvas').getContext('2d');
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window.myLine = new Chart(ctx, config);
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};
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document.getElementById('randomizeData').addEventListener('click', function() {
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config.data.datasets.forEach(function(dataset) {
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dataset.data = dataset.data.map(function() {
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return randomScalingFactor();
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});
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});
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window.myLine.update();
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});
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var colorNames = Object.keys(window.chartColors);
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document.getElementById('addDataset').addEventListener('click', function() {
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var colorName = colorNames[config.data.datasets.length % colorNames.length];
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var newColor = window.chartColors[colorName];
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var newDataset = {
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label: 'Dataset ' + config.data.datasets.length,
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backgroundColor: newColor,
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borderColor: newColor,
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data: [],
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fill: false
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};
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for (var index = 0; index < config.data.labels.length; ++index) {
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newDataset.data.push(randomScalingFactor());
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}
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config.data.datasets.push(newDataset);
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window.myLine.update();
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});
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document.getElementById('addData').addEventListener('click', function() {
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if (config.data.datasets.length > 0) {
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var month = MONTHS[config.data.labels.length % MONTHS.length];
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config.data.labels.push(month);
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config.data.datasets.forEach(function(dataset) {
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dataset.data.push(randomScalingFactor());
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});
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window.myLine.update();
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}
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});
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document.getElementById('removeDataset').addEventListener('click', function() {
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config.data.datasets.splice(0, 1);
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window.myLine.update();
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});
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document.getElementById('removeData').addEventListener('click', function() {
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config.data.labels.splice(-1, 1); // remove the label first
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config.data.datasets.forEach(function(dataset) {
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dataset.data.pop();
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});
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window.myLine.update();
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});
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</script>
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</body>
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</html>
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